New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Sales Representative	Patricio Simpson	USA	1 2 3 4 5
2	Sales Associate	Elizabeth Lincoln	Spain	1 2 3 4 5
3	Owner	Georg Pipps	Italy	1 2 3 4 5
4	Sales Manager	Elizabeth Lincoln	USA	1 2 3 4 5
5	Owner	Jaime Yorres	Brazil	1 2 3 4 5
6	Sales Agent	Pascale Cartrain	Austria	1 2 3 4 5
7	Marketing Manager	Patricio Simpson	Italy	1 2 3 4 5
8	Sales Manager	Antonio Moreno	England	1 2 3 4 5
9	Owner	Matti Karttunen	Bulgaria	1 2 3 4 5
10	Sales Agent	Hanna Moos	Brazil	1 2 3 4 5
11	Owner	Hanna Moos	Argentina	1 2 3 4 5
12	Sales Manager	Howard Snyder	Spain	1 2 3 4 5
13	Accountant	Howard Snyder	Austria	1 2 3 4 5
14	Sales Associate	Paul Henriot	Spain	1 2 3 4 5
15	Marketing Manager	Georg Pipps	Brazil	1 2 3 4 5
16	Accounting Manager	Jaime Yorres	Austria	1 2 3 4 5
17	Sales Manager	Patricio Simpson	France	1 2 3 4 5
18	Sales Agent	Hanna Moos	Argentina	1 2 3 4 5
19	Marketing Assistant	Patricio Simpson	Argentina	1 2 3 4 5
20	Owner	Howard Snyder	Argentina	1 2 3 4 5
21	Accountant	Pascale Cartrain	Brazil	1 2 3 4 5
22	Sales Manager	Matti Karttunen	Bulgaria	1 2 3 4 5
23	Owner	Jaime Yorres	Italy	1 2 3 4 5
24	Accountant	Matti Karttunen	Brazil	1 2 3 4 5
25	Sales Representative	Matti Karttunen	Argentina	1 2 3 4 5
26	Sales Associate	Hanna Moos	Bulgaria	1 2 3 4 5
27	Owner	Pascale Cartrain	Bulgaria	1 2 3 4 5
28	Marketing Manager	Antonio Moreno	Bulgaria	1 2 3 4 5
29	Owner	Jaime Yorres	Austria	1 2 3 4 5
30	Sales Associate	Elizabeth Lincoln	Brazil	1 2 3 4 5
31	Sales Agent	Howard Snyder	Germany	1 2 3 4 5
32	Sales Associate	Matti Karttunen	Argentina	1 2 3 4 5
33	Marketing Manager	Elizabeth Lincoln	Germany	1 2 3 4 5
34	Sales Agent	Jaime Yorres	Brazil	1 2 3 4 5
35	Owner	Hanna Moos	Bulgaria	1 2 3 4 5
36	Sales Agent	Patricio Simpson	England	1 2 3 4 5
37	Sales Consultant	Elizabeth Lincoln	England	1 2 3 4 5
38	Sales Agent	Matti Karttunen	Spain	1 2 3 4 5
39	Accounting Manager	Patricio Simpson	Germany	1 2 3 4 5
40	Sales Associate	Georg Pipps	Bulgaria	1 2 3 4 5
41	Marketing Manager	Georg Pipps	Bulgaria	1 2 3 4 5
42	Marketing Assistant	Hanna Moos	USA	1 2 3 4 5
43	Accounting Manager	Georg Pipps	England	1 2 3 4 5
44	Marketing Assistant	Hanna Moos	France	1 2 3 4 5
45	Sales Agent	Howard Snyder	France	1 2 3 4 5
46	Sales Agent	Paul Henriot	Spain	1 2 3 4 5
47	Sales Agent	Pascale Cartrain	England	1 2 3 4 5
48	Sales Associate	Antonio Moreno	Austria	1 2 3 4 5
49	Sales Manager	Howard Snyder	Germany	1 2 3 4 5
50	Accounting Manager	Georg Pipps	Bulgaria	1 2 3 4 5
51	Accountant	Paul Henriot	England	1 2 3 4 5
52	Sales Representative	Howard Snyder	England	1 2 3 4 5
53	Sales Agent	Elizabeth Lincoln	Argentina	1 2 3 4 5
54	Sales Consultant	Georg Pipps	USA	1 2 3 4 5
55	Marketing Assistant	Paul Henriot	Germany	1 2 3 4 5
56	Marketing Manager	Howard Snyder	Austria	1 2 3 4 5
57	Marketing Manager	Hanna Moos	Brazil	1 2 3 4 5
58	Marketing Manager	Antonio Moreno	Austria	1 2 3 4 5
59	Accounting Manager	Antonio Moreno	Bulgaria	1 2 3 4 5
60	Sales Associate	Antonio Moreno	Austria	1 2 3 4 5
61	Sales Associate	Patricio Simpson	Bulgaria	1 2 3 4 5
62	Marketing Assistant	Antonio Moreno	England	1 2 3 4 5
63	Sales Consultant	Matti Karttunen	France	1 2 3 4 5
64	Sales Manager	Matti Karttunen	Spain	1 2 3 4 5
65	Accounting Manager	Paul Henriot	England	1 2 3 4 5
66	Accountant	Patricio Simpson	Spain	1 2 3 4 5
67	Sales Representative	Pascale Cartrain	France	1 2 3 4 5
68	Accounting Manager	Pascale Cartrain	Brazil	1 2 3 4 5
69	Sales Associate	Patricio Simpson	USA	1 2 3 4 5
70	Marketing Assistant	Hanna Moos	England	1 2 3 4 5
71	Sales Manager	Elizabeth Lincoln	Germany	1 2 3 4 5
72	Accountant	Elizabeth Lincoln	USA	1 2 3 4 5
73	Owner	Georg Pipps	Spain	1 2 3 4 5
74	Accounting Manager	Antonio Moreno	Austria	1 2 3 4 5
75	Accountant	Howard Snyder	France	1 2 3 4 5
76	Marketing Manager	Howard Snyder	Austria	1 2 3 4 5
77	Sales Consultant	Patricio Simpson	Italy	1 2 3 4 5
78	Accountant	Jaime Yorres	Argentina	1 2 3 4 5
79	Sales Associate	Antonio Moreno	Bulgaria	1 2 3 4 5
80	Sales Representative	Patricio Simpson	England	1 2 3 4 5
81	Accountant	Hanna Moos	Germany	1 2 3 4 5
82	Sales Associate	Howard Snyder	Argentina	1 2 3 4 5
83	Sales Consultant	Patricio Simpson	Bulgaria	1 2 3 4 5
84	Marketing Assistant	Paul Henriot	Bulgaria	1 2 3 4 5
85	Sales Manager	Howard Snyder	France	1 2 3 4 5
86	Owner	Hanna Moos	Austria	1 2 3 4 5
87	Sales Agent	Elizabeth Lincoln	Germany	1 2 3 4 5
88	Marketing Assistant	Jaime Yorres	Bulgaria	1 2 3 4 5
89	Marketing Manager	Paul Henriot	France	1 2 3 4 5
90	Sales Consultant	Jaime Yorres	Brazil	1 2 3 4 5
91	Sales Representative	Pascale Cartrain	Brazil	1 2 3 4 5
92	Owner	Elizabeth Lincoln	Argentina	1 2 3 4 5
93	Sales Representative	Matti Karttunen	Italy	1 2 3 4 5
94	Sales Manager	Antonio Moreno	Bulgaria	1 2 3 4 5
95	Sales Associate	Georg Pipps	Bulgaria	1 2 3 4 5
96	Sales Representative	Matti Karttunen	Bulgaria	1 2 3 4 5
97	Marketing Assistant	Patricio Simpson	Argentina	1 2 3 4 5
98	Accounting Manager	Jaime Yorres	Argentina	1 2 3 4 5
99	Owner	Paul Henriot	Brazil	1 2 3 4 5
100	Marketing Manager	Matti Karttunen	Bulgaria	1 2 3 4 5


...291 292 293 294 295 296 297 298 299 300 Item 297001 to 298000 of 300000 Page: of 300 GoPage size:

Sort Ascending
Sort Descending
Clear Sorting
Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="c#" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.GridExamplesCSharp.Performance.Virtualization.DefaultCS" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

Support & Learning Resources

Find Assistance

Submit a support ticket if you have an active license or trial
Post in the forum if you don't have access to support

Virtualization

Related Resources

Support & Learning Resources

Find Assistance